Lugia

Lugia is the hardiest character in Project Catch 'Em All and one of the two possible bosses at the end of Battle mode, along with Mewtwo. While Lugia may not be the most powerful, it does have powerful attack like Aeroblast and Sky Attack; though they cause the ATB bar to recharge slowly, Lugia's bulk allows it take many hits, so this isn't such a problem. As Lugia is a Psychic-type, it is strong against Poison- and Fighting-type Pokémon, but weak to Dark-, Ghost- and Bug-types.